《Table 4 Knoevenagel condensation reaction catalyzed by complex 1*》

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《"[Zn(Pybox)Br_2]配合物的合成,晶体结构及催化性质研究（英文）"》

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*Isolated yield；Reaction condition:activated methylene compound（0.5 m M，2.0 equiv）；ferrocenecarboxaldehyde（0.25 m M），1 mol%Zn catalyst，and 1.0m L H2O，under air.

Knoevenagel condensationreaction between ferrocenecarboxaldehyde and active methylene compounds is often used to test the catalytic activity of obtained zinc complex 1.The ferrocenecarboxaldehyde and different active methylene compounds were performed to give the desired products in high yields using 1 mol%zinc complex 1catalyst in water at room temperature（Table 4，2a，2b，2c and 2d）.The results showed that the complex（DmPybox）Zn Br2was more efficient than that of the complex（Dm-Pybox）Zn Cl2[13].The difference in catalytic activity is most likely due to the bromide anion being a better leaving group compared to chloride anion.Knoevenagel condensation reactions are more likely to take place when bromide anion replace with chloride anion in zinc complexes with Dm-pybox ligand.